It would be helpful if you were to post the headers from one of the emails marked as SPAM so we can see which checks it has hit. You could also update /opt/zimbra/conf/amavisd.conf.in and change the log_level to 2 and then restart ZCS. This would provide more information in /var/opt/zimbra.log of what is happening to the email.

It would be helpful if you were to post the headers from one of the emails marked as SPAM so we can see which checks it has hit. You could also update /opt/zimbra/conf/amavisd.conf.in and change the log_level to 2 and then restart ZCS. This would provide more information in /var/opt/zimbra.log of what is happening to the email.

Well that email is hitting lots of SA rules When training the only thing that is effected is the BAYES_ rule. If these are valid emails then you should either whitelist the address or create your own SA rule to lower the scoring.

means that Zimbra is tagging your message as junk. If this message did not land in your junk folder, but rather in your inbox, something else is wrong. Are you checking it on the Zimbra web client, or perhaps another mail client?

Classifying a message as Junk, as uxbod has said, merely increases the Bayesian scoring, and your header's score of "BAYES_99=3.5" means that it already has the highest possible Bayesian spam score. You can increase the point value for Bayesian filtering as described here, but that won't help in a message that already exceeds the 6.6 point threshold.

We still have to figure out why something with a score of 14.998 isn't landing in your junk folder. I wonder if perhaps you have some kind of filter overriding the spamassassin process?

I want to block message from email address abc@yahoo.com or def@gmail or any other email from getting in my inbox. So i mark that email message as junk in zimbra webclient.

Even i mark certain message as junk through zimbra webclient (and automaticly move to junk) but still receive message from the same email address in my zimbra webclient inbox. I run zmtrainsa also nothing happen, never block & never move the message to junk folder.

Message with X-Spam-Flag:YES still get inside in junk folder. No problem & right now no issue about that.

My conclusion, JUNK button or zmtrainsa not functioning. Spamtrain.log also no error ( ... i think).

Nothing wrong with what the Junk button or zmtrainsa does. As we have already said that just trains the SA bayes database. If you wish to permanently block those email address then you should look at implementing a Wiki :: Blacklist.